Home / 30,931.86-42,676.14-18,180.96

Finding the Fourth Proportional to 30,931.86, 42,676.14 and 18,180.96

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Solution

The fourth proportional to 30,931.86, 42,676.14 and 18,180.96 is: 25,083.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,931.86 : 42,676.14 = 18,180.96 : x
  2. Step 2: Convert to fraction form
    30,931.86/42,676.14 = 18,180.96/x
  3. Step 3: Cross multiply
    30,931.86x = 42,676.14 × 18,180.96
  4. Step 4: Simplify right side
    30,931.86x = 775,893,194.29
  5. Step 5: Solve for x
    x = 775,893,194.29/30,931.86
  6. Step 6: Final answer
    x = 25,083.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.